html,body {
  width: 100%;
  height: 100%;
}
#root {
  width: 100%;
  height: 100%;
}
* {
  margin: 0;
  padding: 0;
}
.appwrap {
   width: 100%;
   height: 100%;
   display: flex;
   flex-direction: column;
}
.one {
   height: calc(100% - 40px);
   overflow-y: auto;
}
.footer {
  background: pink;
  width: 100%;
  height: 40px;
}